Footwear upper



FIG. 1 is a perspective view of a footwear upper embodying the new design;

FIG. 2 is a top view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a front view thereof; and,

FIG. 6 is a rear view thereof.

The dash-dash broken lines in the figure views depict stitching, which forms no part of the claimed design. The dot-dot dash broken lines in the figure views show features that form no part of the claimed design. Further, the dot-dot-dash broken lines immediately adjacent the solid line portions of the design form the boundary of the claimed design, with the broken lines forming no part of the claimed design. 

CLAIM The ornamental design for a footwear upper, as shown and described. 